145235-86-5Relevant articles and documents
A Bulky Three-Hindered Quadrant Bisphosphine Ligand: Synthesis and Application in Rhodium-Catalyzed Asymmetric Hydrogenation of Functionalized Alkenes
Sawatsugawa, Yuuki,Tamura, Ken,Sano, Natsuhiro,Imamoto, Tsuneo
supporting information, p. 8874 - 8878 (2019/11/03)
A bulky three-hindered quadrant bisphosphine ligand, di-1-adamantylphosphino(tert-butylmethylphosphino)methane, named BulkyP*, has been synthesized via a convergent short pathway with chromatography-free procedures. The ligand is a crystalline solid and can be readily handled in air. Its rhodium(I) complex exhibits very high enantioselectivities and catalytic activities in the asymmetric hydrogenation of functionalized alkenes.
Practical enantioselective hydrogenation of α-aryl- and α-carboxyamidoethylenes by rhodium(I)-{1,2-bis[(o-tert-butoxyphenyl) (phenyl)phosphino]ethane}
Mohar, Barbara,Stephan, Michel
, p. 594 - 600 (2013/05/09)
The rhodium(I)-{1,2-bis[(o-tert-butoxyphenyl)(phenyl)phosphino]ethane} [Rh(I)-(t-Bu-SMS-Phos)] catalyst system displayed prime efficiency in the hydrogenation of large series of aamidostyrenes and a-amidoacrylates. Up to >99.9% enantiomeric excesses coupl
Development of an asymmetric hydrogenation route to (S)- N -Boc-2,6-dimethyltyrosine
Praquin, Celine F. B.,De Koning, Pieter D.,Peach, Philip J.,Howard, Roger M.,Spencer, Sarah L.
, p. 1124 - 1129 (2012/01/06)
An improved, simpler and potentially more economical route to (S)-N-Boc-2,6-dimethyltyrosine 1, based on a previously published route, is presented. Key modifications were to prepare the dehydroaminoacid hydrogenation substrate 6 in a one-pot process directly from serine methyl ester and 4-iodo-3,5-dimethylphenyl acetate 4 and to identify a significantly more active asymmetric hydrogenation catalyst that allowed a 5-fold reduction in catalyst loading.
